Carriage-controlling mechanism for type-writing machines.



PATENTED MAR.19, 1907.

I l I I No 84.76 3 I J. B. $30011. CARRIAGE CONTROLLING MEOHANISM'FORTYPE WRITING MACHINES.

APPLICATION FILED MAR. 2, 1904.

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135 1 C1 ll'o-z New N .8 7.6 s; m'rmrrmn MAR. 19,1 07':

p 4 J. B. SEGOR, 9

CARRIAGE GON-TROLLINGMEOHANISM"FORIIZYPE WRITING MACHINES.

' APPLICATION FILED HA E. 2, 1904.

4 sums-45321 2.

L minus. 14mm 0091mm. 0. c.

I'ATENTED MAR.19,1907.

. J. B. vsneak. v CARRIAGE CONTROLLING MEGHANISM r011 TYPE WRITING MAOHINBS.

APiLIOATION FILED RAB. 2, 1904.

lm-linux00 ml: mus. (3m, um. Immfln. II- c.

No'v847 613. PATENTED MAR. 19, 1907. I A J.-B.SE GOR.

CARRIAGE CONTROLLING MECHANISM FOR TYPE WRITING MACHINES.

APPLIUATION FILED MAR. 2, 1904.

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ZIUNITED v TATES "JEROME B. SECOR, or

PQ NT oFFron.

DERBY," CONNECTICUT.

,cAa'Fnaes-cournoruue MECHANISM Fon TYPE-WRITING MACHINES.-

i No. 347 313.

- tion.

To qlldjwltjorit 26 mg concern; 1

Be it known that LJnnoMn B. Sncon, a.

citizen of "the United States, residing at Derby,,'in the county of NewHaven-and State of Connecticut, have invented certain new rand usefulImprovements in Carriage-Conto disassemble..otherparts of the machine inremoving the arts of such mechanism for the purpose ,o' repairing orreplacing said parts; M

Inthe-present invention 1 have provided an inde endent frame upon whichall of the parts 0 the escapeinent mechanism and the' carriage-feedmechanism are mounted, so that the same may be removed'frorn themachine-"proper, as a whole, for replacingor repairing othe parts.

My invention furthermore relates to many improved details of structurehereinafter fully describedand shown in the accomp'anymg drawings,in'which like reference characters refer to like parts, and in whioh--Figure 1 is a longitudinal section through Qa' .oiti'on ofa type-writingmachine provided "with'my im roved carriage-controlling mechanism for t1e purpose of showing the operation 'of'the'same, part of the saidmechanism bein'gfremoved for the purpose of clearness.

and frame, showinga portion of the types writer frame and the lmeansfordetachably inorinting the said frame therein, Fig. 3 1s a rear elevationof" the said-' frame detached andthemechanismcarriedxthereby. Fig.- 4

Y is afr'ont 'elevati'ono'fthe same, withtparts of the/frame removedto'disclose more clearly;

the rhechanism, carried thereby. Fig. 5 is a top plan view of thesame abottom plan view of the same." 'Fig. 7- is. a=de.

tail rear elevation'illustrating tl1e dis'engaged Specification ofLetters Patent. Application filed Maroh2,1904. Serial in; 196,172.

Patented. Math 19, 1907.

position of the trip-escapement d o'gi' 8 1s a gated top plan view ofthe trip-dog, showfinger. Fig. 9 is a detailperspective view of thetrip-dog. Fig. 9 is a transverse sec- 'tional' view through thedetefiableframe, showing the trip-dog ,forcedi t of engagement'independently of the feed rock-arm. Fig. '10 is a detail,perspective view of the spacing-dog. Fig. 11 is a detail perspectivewheel. Fig. 12 is a rear elevation, w1th parts broken away, of thespring-drum gear-wheel, the carriage-feed rack-bar in engagement theescapement mechanism. Fig. 13 is a slightly-modified form of escapementdog's; Fig; aegis a plan view of the same,'with the escapeinent wheeland release-frame removed; Fig; 15 is a front. elevation of the feedrock-arm carrying thejinodi'fied form of escapement-dogs. elevation ofthe tripgdog' bracket, showing the spring c'ontrollinglthe movement ofthe the detachable frame-bolsters ivoted to the machine-frame. I tiveview of the bell-clapper and clapper-trip device.

Referring now in detail .to-the drawings, 1

chine having the platen-carriage 2 mounted thereon to travel transversethe machine and carrying a feed rack-bar 3, Mounted beneath the rack-bar3 in the machine-frame is a detachable frame or housing 4. Frame 4 isheld in adjusted position by movable plates or clamps e pivotallymounted on posts 4'on the machine-frame and engaging fmmetnd bybolsters. o l f g. devaae, and r n l i 'h ped face whichi az gag thender. e; V the frame 4 upwardly against clamp and left-make room. toallow-the detach le' frame/1 to be easily put-in p1 v I 1'2. and pinion17 under thete feed rack 3. j Swinging. the bolsters, ,plagcei'mses viewof two of the teeth of the esca ementtherewith, and the pinionsconnecting the rack-bar and spring-drum gear-wheelwith rear elevation ofthe detachable frame and the mechanism carried thereby,-showing ag- 6 fadetail front said dog. Fig. 17 is a detail top planview of pivotally.niounted an, the i, machine fra'me of; the frame '4 to force withthe'geafr ing a-portion of the escapement-throw-out' Fig. 18 is a etailperspecrepresents the frame of any type-writing ma- I the upper sides ofthe end cross-pieces of said I The bolsters 1W when turnedontwariilyi'i'ht the frame 4 so that the teeth ve an-wheel 12 and pinion 1 7 arebrought or advanced into engagement with rack'3 more" readily 5 whichprevent the rearward'movement of the carriage rack-bar 3.

4 are glide-posts, one at each end of the frame 4 and which preventendwise "displacement of the frame when in its operative position. Thepins or projections 4" andthe posts' 4 form guide-pockets for receivingthe corners of the frame 4 to guide thesame into the proper positionwhen elevated into its operative position in a manner hereinafterdescribed.

Frame 4 has rotatably mounted therein a shaft 5, upon which is mounted afeed-spring detachable frame 14 beyondithe line'of the drum or barrel'6, in'which is mounted the.

customary carriage-feed spring 6;, Fig. 4. Shaft 5 has at its rear end athumb iece 7," screw-threaded to the said shaft, on also a windinratchet-wheel 8, rigidly mounted on the sai shaft and ads. ted to turntherewith. 9 is a winding-paw pivoted at 10 to the detachable frame 4and having teeth '11 engaging alternately' the teeth of the-ratchetrwheel 8 to prevent reverse movement of sa.id'

- I 'dog-andat itsother end to the bent portion The spring-drum 6.isrotatablvmounted' ratchet-wheel.

upon the shaft 5, the spring 6- insaid drum being connected atone end tothe said shaft and atits other end to thesaid drum in cus tomary mannen;1

therewi the teeth of the said gear-wheel 12 meshing with-the teeth ofthe carriage=feed gage the end of a safety stop-lever 108, pivoted tothe frame 4 an adapted to be moved into and out of the path of saidprojection or pin 12. The movement of lever 108 is limited by lugs orears 108*. Safety stoplever 108 serves as a lock to the machine when notin use and also to prevent sudden unwinding of the mairspring while theframe 4 is being removed from the machine, and thus saving the partsfrom injury. Rotatably mounted on a pin 13 in the detachable frame 4 ora bracket 14 thereon, Fig. his a pinion 14, the teeth of which mesh withthe teeth of the gear-wheel 12, Figs. 4 and 6. Ro tatably seated abovethe'pinion 14 in the detaoh-able frame 4 is a shaft 15, upon which isrigidly mounted. a sleeve 16, having at one end a pinion 17, meshiiz gwith the teeth of the pinion 14 and also with the teeth of thecarriage-feed rack-bar 3, and at its other end a ratchet wheel 1 8. Bymounting the springdrum gear-wheel 12 and the pinion 17 so that theirteeth engage the rack-bar a more perfect control and steadier feed ofthe carriage 65 by the escapement and oarriagmfeed'mech- 12 is agear-wheel mounted upon the shaft I 5 and r' idly secured to the drum 6to rotate.

37 and a beveled back 38.

anlsm, respect1vely,1s nsured by increasing the amount of grippingsurface in engage The inmec anism is replaced after removal the teeth onsaid gear-wheel and pinion will readily enter tin-so of the rack 3.

' 19 is an escapcment-wheel loosely mounted on the shaft againstratchetovheel 1S and carryingspringressed pawls 2O 21. in engagementwith t e ratchet-wheel 18 to allow reverse movement of the sleeve 16independently of the escapement-wheel 19,F1gs. 1 and 5.

Fulerumed at 22 23 on the frame 4 is a feed rock-arm 24, having at itslower end a lug or rojection 25, Fig. 3, for purposes .hereina terdescribed. Rock-arm 24 carries .on its front face a space-do 26, Figs. 1and 4,'and shown in detail in Fig. 10, and'on its rear face a'trip-do27, Figs. 1 and 7, and shown in detail in ig. 9. Dog 27is'oscillatorially mounted upon a pivot 28, the said dog being held inforward position when disengaged from wheel 19 by'a trip-spring 29,-

secured at. one end to a hook 30 on the said 31 'ofthe arm 24- Theforward movement of the trip-dog 27 is limited by a pin 32,

'Inountedin the rock-arm 24, engaging slot or, perforation- 33 in thesaid dog 27.

' 34 is a band-spring secured at its lower end to the rock-arm 24 andconnected to the dog 27 at its upper end through means of a slot 35,engaging the in 32, seated in arm 24 and passing throng dog 27,saidspring 34 being adapted to retain or hold said dog normally against thefeed rock-arm 24.

Dog 27 is so mounted as to be capableof sidewise as well as oscillatorymovement. As shown in Figs. 9 and 9*, the said dog-27 is made with ashoulder 27*- on one side and 'aflconc'avity 27 on the other sidethereof 'forming a loosely-fitting knife-edge at its 34 from engagementwith the teeth of the ratchet-wheel independent of or without movementof the feed rock-arm 24. Dog 27 is provided with a tooth having a squareface Dog27 is also provided with a shoulder 39, adapted when the saiddog is in engagement with one of the teeth of the oscapement-wheel 19 toabut :1 lug 40, projecting through roek arm 24 ou a bufi'er-arm41,.pivotally mounted on a pm 42, seated in the front face of the rook-arm 24. Buffer-arm 41 is also provided with a lug 43, which projectsthrough rocl -arm 24 and is bent to engage the opposite side of'the saidrook-arm 24, Fig. 3, to hold the said buffer-arm snug thoreagainst.

. strikes the'end of theslot 33.

44 is an adjustable. stop pivoted at 45 to the arm 24 and engagmg thelug 43.

46 is a spring secured at one end to the arm coiled about the in 42, asshown in Fig. 6, and engaging the u 43 on buffer-arm 41 to hold the samenorma ly against the stop 44.

47 is a cam pivoted to the front face of the rock-arm 24, the edge ofsaid cam bearing against the spring 46.

Vibration of the arm 24 in the usual step by step feed of the carriage,which is aecomplished .in the mannerhereinafterdescribed,

throws first the trip-dog 27 and then the spac edo 26. out of engagementwith the teeth of t reescapement-wheel 19, one of said do s being inengagement with the said teeth while the other is at rest. When forcedout of engagementwith one of the teeth of the escapen' ent-wheel 19, thetrip-dog 27 is drawn forward by spring 29 until the pin 32 tionthe'said'dog is in a position to strike the beveled back of the toothfrom which it has previously been disengaged to slide into engagementwith the square face of the next succeeding, .tooth ofhthe said" esca'emeritwheel19. Upon engagementflwith t e next succeeding tooth dog ,27is harried rearwardly by escapement wheel 19 in o positionto the spring29-until the shoul er 39 strikes the lug 40 on buffer-arm 41, themovement of which is opposed by the spring 46. 7 The tension ofsprmg46'may be regu-' lated through ad'ustment of the cam 47.

The position of t e buffer-arm 41 may be adjusted by adjustment of thestop 44. It will thus be seen that the resistance of the dog 27 whenforcedback against the buffer arm 41 byone of the teeth of the escaementwheel'19 'may'be regulated. vTheo ject of the buffer-arm 41 is todeaden the impact and preventinjurious jolting of the parts.

Fulcrumed to the detachable frame 4 above the arm 24 is a depressibleescapement throw-out frame 48, Figs. 1 and 3, the movement of which inan upward direction is limited by a projection or finger 49 thereon,engaging the frame 4, the downward movement of the said frame 48 beinglimited by a finger or projection 50, engaging a finger or projection 51on the. frame 4. Frame .48 .is' provided with a curveddownwardly-extending escapement throw-out finger 52, which passes to oneside of the dog 26 and over the arm 24,

which is recessed in its top side, as shown in dotted lines in Fig. 13',and engages the under side of the dog. 27.

Fra' -e 48 1S provld'ed at the upper portion thereof with abearing-flange 53 ,'en'gag1ng a bearing-flange' 54, hung to a swmgmgframe 55,,cairied by the platen-carriage, connected at its upper. end toa finger-release lever 56, and sliding on the carriage-feed rack-bar 3.

Flanges 53 and 54 and parts connected thereto form alo'ose connectionbetween" the ment-dogs.

In this posi-v release-key' carriage aind ithe -escape- Upon depressionof the fingerrelease lever'56 the frame55 is depressed, and

through the bearing'fiange 54 pr sses th? 1 bearing -flange 53 ontheescapement-throw out franie 48, forcing the finger 52 against the tooth37 of the dog 27 and forcing said rock-arm 24, out'of engagement withthe teeth, of the escapement-wheel 19.

tooth, independently of any movement of 7'5. Normallythe ratchet-dog26is out of en;

gagenient with, the teethjof the wheel 19,

while the tri -dog 27 is normally in engage I ment with '0 1e teeth ofsaid wheel 19.. This ,1 p p rock-arm 24, caused by'the spring 107. The L.depressible frame 48 andits escapement throw-out finger 52 are"provided for'thel'pnrisbecause of the normal position of the feed,

pose of throwing the dog 27 out'of engagement i with the teeth of thewheel 19 without di s.

turbing the position of the ratchet-dog-26', so that by-depressing thelever 56 on the majchine-carriage dog 27 is forced out of'engag'e mentwith the teeth on wheel19, so that both" 99. and the carriage will beallowed to proceed, 4 under control of the hand of'the operator,-

dogs 26 and 27 are then'out of engagement to any desired positiondetermined by the po sition of one'of the ordinary stop devices (notshown) ,on the machine-frame. By reference" to Fig. .9 it will be seenthat dog :27 is capable" of sidewise'movement in addition to its'piv- Iotal movement. In Fig. 9 both dogs-are shown out of engagement withltheteeth of the escapementwheel19.

gear-wheelsis governed the xiiov'ement of hrough the connections:between the es- 'capem.entwheel 19 and the gear-wheel 17', V and thegear-wheel 12, carried bythe'spring drum 6, the feed of the carriage'by'the said I05 the escapement-wheel 19, the carriage being I fedforward only when the said escapementwheel is disengaged from theescapemen'tdogs. 18 allow for the return 'of'the carriage tolts' Thepawls 20 21 and "ratchet wheel rro initial position at the right of themachine; T through reverse rotation, of the sleeve, 16

without communicating motion to the e's-.

capenrentwvheel and-ratchet connection between the sleeve '16 Ifdesired, such pawl and the esoapement-wheel 19 may be dis pense'd With,owing to the beveled backs of the teeth on' the escapenifent-wheel19,"as" shown inFig. 11, and the beveled' back of j 420 trip-dog "27,Fig. 9. By making the backsdog, allowing initial posit1on. I

h the trip-dog is out of engagement with escaper'nent-wheel 19, bracket57' is held in a forward position against the stopin- 59, seated 1narm-.24, by a spring 60, coil'e {about "the; pin. 58, one end of thesaid spring being held a pin or projection 61 on the arm 24, gthe otherend of the said spring being'heldby a pin or projection 62 on thebracket 57.

' Bracket 57' is provided with eye-lugs 63, carrying a pivot-pin 64,upon which is rigidly mountedthe trip-dog 65. 66 is a spring coiledabout the pin 64 and adapted to hold the dog 65 normally against -thebracket 57 Bracket 57 is provided with. a rearward extension or arm 67.Upon the opposite side of the arm 24 to that u onwhichthe tripdog 65' ismounted a b'u er-arm 68 is pivotally mounted on pin 69. Buffer-arm 68 isrovided with a lug or projection 70, projectlng through the arm 24. 71is a spring connecting an arm 72 on the arm 68 with a lug or sion 67 ofthe bracket 57. With the modifications just described in theconstruction of I. the movable escapement-dog and its mounting itfwillbe clearly seen that the same funcrtiOIlS may be performed by the saiddog as .thoseiof the dog27, hereinbefore described.

The depression of the finger52, carried the release-frame 48', willforce the dog 5 f outwardlyout of engagement with the teeth ing on itspivot-pin 64, the spring 66 returnof the esca ementwheel 19, said dogturning the dog to its normal position against bracket 57 uppnwithdrawalof the finger 52. The lug or pro ection 70 on the buffer-arm 68 deadensthe impact and prevents injurious jolting of the parts in the samemanner as the buffer-arm 41 receives the impact of the dog 27.-

The frame 4 forms a suitable support for 'thesignalingmechanismcomprising the bell, "the bell-clapper, and the clapper-tripping devlce.

The bell 100 is suitably mounted. on one sidev of the frame 4, Fig. 3.The'bellclapper 101 is hung on a pivot-pin 102,

mounted in a bracket 103 and a suitable lug or projection 104 on theframe 4. The clapper 101 has a suitable shank, U-shaped at its upper endto form a double bearing on pin 102 to prevent lateral vibration of theclap- The shank of the clapper'101 is also er v bent to form. an arm101*, depending from its hearing, which arm is adapted to be en gaged bythe pin 105, carried by a weighted arm 106,"'Hio,unted on the pivot 102.The pin 1.05 is so positioned on the arm 106 as to engage only one sideof the downwardly-projectlng arm 101 on the shank of the clapper 101.Arm 106 projects upwardly into the path of a suitable tripping device(not shown) on the machine-carriage.

In the ordinary travel of the carriage when the same has reached asuitable point determined by the position of the tripping device on thecarrriage the upwardly-projecting end of thearm 106 is engaged by suchtripping device, being forced over and through pin 105, bearing againstthe depending arm 101? of the shank of clapper 101, turning the shankofthe clapper 101 on its-pivot-pin 102, and thereby elevating the clapper.When the tripping device on the carriage has passed over theupwardly-projecting end of the arm 106, theweight on the lower end ofthe arm 106 returns said arm to its normal position, allowing theclapper to descend quickly'and contact with the bell 100. When 'thecarriage is returned to its initial position, the tripping devicethereon again passes over the upwardly projecting end of the arm 106,but this time depresses thesame in the opposite direction,.carrying thepin 105 away from the depending arm 101, so that the position of theclapper is not disturbed.

- I have now described the detachable frame, the esca ement mechanismcarried thereby, the bel -trip device, the carriagefeed mechanism perse, and the means for (throwing out the said mechanism upon depressionof the carriage-finger-release lever, and -wi 11 now proceed to describethe means for actuating such mechanism upon actuation of thespacing-lever or type-bar.

74 is the spacing-bar, positioned at the front of the machine, Fig. 1,and mounted upon a rock-frame 75, connected by an upwardly-projectingfinger 76 to a link bar 77, extending longitudinally through the machineand sliding at its rear end upon the keybar fulcrum-plate 78. Link 77 isprovided with a loop 79, engaging a downwardly-projecting finger 80 onthe inclined link or rod 1 81, pivoted at its forward. end to arook-arm82, mounted on a rock-shaft 83, extending transverse the machine. Link81 has bolted to its rear end a plate 84, having an upwardlyprojeetinglug 85, engaging the rear side of the proj ection 25 on rock-arm 24, asshown in Fig; 1. Plate 84 and projection 25 and parts connected theretoform a loose connection between the key-levers and the escapementdogsvOne of the bolsters 4 is extended, so that in addition to bolstering upthe frame 4 against clamps 4 it will elevate plate 84 and lug 85 to theplane of projection 25 and form a sliding bearing for said plate. Thekeybars 86 are fulcrumed on fulcrum-plates 78 at the rear of the machineand are held normally in raised position by springs 87, se-

I cured at one end to a portion of the frame of the machine and at theirother end to the -1 o 88, co nnected to the saidkey-bars 86 by astraddle-link 8'9, Bell-cranks88 are pivoted at 90 to brackets 91,mounted in any suitable z manner on the frame of the machine.

ets '94, mounted on'the, bridge 95 of the machme and-connec'tedsbystraddle-links 933710 in, bell-cranks 8'8a. j f1 I 97-isa hook carriedby each of the'straddle- 96 and' adapted 'toengage a universalba't198,0a1 ed by'thefl rock-arms 99 (one only ishownlon'shaft 83;:

, 'A-d "press on of any one of the key -bars 86 I gexertsadownwardpull'of the straddle-links.

B9,' depres sing the forward arm of the bellcrankf88, 'pufl ing .the'straddle-link 96 to throw the-. type-bar 92 to printing position,

through the hook 97-pulling' the universal har: 98"forward,which carrieswith it the rockarms;99 ,"Forwardmovement of the rock- I arms 99 willexert'a forward pull on the link iorbar S-Ijthro'ugh its rock-arm82,,pu1ling the 'plategz84fboltedthereto at its rear end, forfwa'rdandvibrating the rock-arm 24. It will lbe readily'seen thatvibration of'the rock- 1 am-24mm throw the trip-dog 27 or 65 out of 1f-itsnormal-engagement'with the teeth of the escapemjenhwheel 19. y Thearm 24 is vibrated hy'thespace-bar 74: through means of the upwardlyprojecting finger 7 6 pulling on the linl-''Z7,"and thereby exerting aforward pull upon:thedownwardly-projecting finger .80. of-t1 1' e;linkorbar 81.

" flQTisafbfind-spring secured at one end to and-mounted on frame 4 andhearing at its free en'liagainst the 'i'eed'rock-arm 24, so'that,theordinary-rockmg movement of said arm 24toproduce' the step-by-stepfeed of the care riage-is in'opposition to said sprir g 107 which "ateachvibration of'the'arm 24a returns-the same to its normal position, g

1 "109 is a stop-pin against which rock arm hgZd-Fid'heldby' spring- 107when in its normal po'sitionfi 'Pin 109 prevents spring 107 fromfprcing'the'lower'portion of arm 24 too far h 'ward the rear of themachine; which would,

throwboth the space and the trip dogs out of gear'with'escapementswheel19. 21: the modified structure shown in Figs. 1' 3,'14,1'5, and-16instead of'the spring 109 a coil-springllO, secured at one end to. frame4 andatitsiotherjendto a projection or arm of spring maybe iised witheither structure;

. Idonot' wish to limit myself to the exact Imean's for throwing out theescapement 'gnecham'sm toallow the carriage to be brought y hand't'o anydesired position, inasmuch as (95 this may be varied without departingfrom f may j 4 shown and described. 92 arethe tyPe rb-ai's, pivoted; at93 to bracknation with t Lll'on rock arm 24,is used. It willvbe un-'derstoodithat either form structure without departing from the spiritof thesame, and I do not, therefore, desire to be hmlted to the exactdetails" of structure Having-thus described my invention, the followingis What Iclaim as" new therein and .position, and clamps for clampingsaiddetachable frame-in such position.

2. In a type-writing machine, the combination with the machine-frame, adetachable frame and carriage-controlling mechanism mounted thereon, ofprojections on the machine-frame forming pockets to receive the thespuirit ofmy invention. *Myinvention I e, furthermore, varied in detailsof corners ofsaid detachable frame, of bolsters for elevating saiddetachable frame into its operative position, and suitable clamps forclamping the said frame in its operative 'position. a 1 SQIn a tye-writingmachine, the combihe machine-frame, a detachable frame andcarriage-controlling mechanism on said machine-frame in position to abutsaid detachable frame and prevent rearward movement of the same, postsor projections on said machine-frame in position to abutand preventsidewise movement of said detachable .frame, means for elevating saiddetachable frame into its operative position, and means for clampingsaid detachable framein such osition.

4.- 'n a type-writing machine, the combination, with theescapement-wheel and a feed rock arm mounted in juxtaposition thereto,of a space-dog rigidly mounted on said rock-arm, a trip-dog movablymounted -on sand rock-arm, springmeans connected to and holding saidtrip dog normally in a forward position and toward the teeth of theescapement-wheel, and an adjustable springresisted buffer-arm inposition to engage and.

oppose the rearward movement of said tripe dog when carried backby'engagement with the teeth of the escapementwheel.

5. In a writing-machine, the combination with'the machine-frame, or thedetachable frame mounted therein, and means mounted" 95 &mountedthereon, of stop pins or projections on the machine frame for elevatingand justed position.

6. In a type-writmg'machine, the combination with a toothed escapementdevice geared to the carriage, of a feed rock-arm clamping saiddetachable frame into its admounted in juxtaposition thereto, of a spacedog rigidly mounted on said rock-arm, a tripdog movably mounted on said'rock arm,

spring means connected .to and holding said trlp-dog normally 'in. aforward position and toward the teeth of the escapementwheel, anadjustable buffer-arm in position to Oppose the rearward movement ofsaid trip-dog when carried back by, engagement with the teethof theescapeinent-wheel, and an adjustable spring resistance opposing saidbuffer-arm.

7. In a writing-machine, the combination with the machine-frame and thecarriage mounted to travel thereon, of the detachable frame, thecarriage-feed mechanism mounted thereon, and the means for elevatingandclamping said detachable frame into adjusted position! 8. Inawaiting-machine, the combination with the "detachable frame and thecarriagefeed mechanism carried thereby, of a pin or project-ion carriedby said mechanism to travel therewith, and a pivoted stop mounted onsaid frame adapted to be thrown into the pin or projection to stop saidmounted to travel thereon, of a gear-wheel geared to said carriage, afeed-springmounted to rotate said gear-wheel, an escapement- 'wheel,apinlon mounted to rotate said escapement-wheel and geared to thecarriage, and a pinion engaging said gear-wheel and saidescapement-wheel pinion.

11. In a ty e-writing'machine, the combination with t emachine-frame andthe carriage mounted to travel thereon, havinga feed rack-bar, of agear-wheel meshing with said rack-bar, an escapement mechanism, a

pinion mounted to rotate with the escapement-wheel and in mesh with saidrack-bar, and a pinion meshing with .the gear-wheel and with the pinionmounted to move with the escapement wheel. I

12. In a writing-machine, the combination with the machine-frame and acarriage mounted to travel upon 'said frame, an escapement devicecontrolling the movement of said carriage, a feed rock-arm.mounted uponsaid escapement device, a rigid dog on said arm, a spring-pressedindependentlymovable dog mounted on said arm, a depressible frame inengagement with-sa d independently-movable dog, means for rocking saidarm to throw said dogs alternately into and out of engagementwith saidescapement device and meanscarried by the carriage 1n slidableengagement with said depressible frame to de re'ss said depressibleframe and throw said independently-movable dog out ofengagement with theescapement device independently of said rock-arm.

13. In a writing-machine, the combination with a detachable frame andthe carriage-feedmechanism carried thereby, of a rigid stop device and amovable stop device one of said devices being carried by said feed.mechanism to travel therewith and the other of said stop devices beingmounted on said frame, said movabledevice adapted to be thrown intoe'nga ement with the rigid stop device to stop sai mechanism.

14. In a type-writing machine, the combination of a housing removablefrom the machine-frame, a feed spring-barrel mounted in said housing andmeans for locking said spring-barrel against rotation while out of themachine-frame.

15. In a type-writin machine, the combination of a removable ousingcarrying feed and esoapement mechanism, means for securing said housingin the machine-frame or releasing it therefrom and a lifting device forsaid housing serving to advance the gearing carried thereby into meshwith the carriage-feed rack when the housing is restored to normalposition.

16. In an escapement for type writing machines, the combination with amember having teeth with beveled rear faces, ofa pair of dogscontrolling the movement of the toothed member, one of said dogs beingprovided with a beveled face; means providing both of said dogs with asimultaneous movement transverse to the plane of the said toothedmember, and means providing said beveled dog with a movement in theplane of the toothed member and an independent movement transverse tosaid plane, said independent transverse movement being caused by theengagement of a beveled face on the soothed member with the beveled faceon the 17. In an esca ement for type-writing machines, the combinationwith the carriagespring, of the toothed member moved by thecarriage-spring, a pair of dogs controlling the toothed member, meansproviding both of said dogs with a simultaneous movement transverse .tothe lane of said member, means providing one of said dogs with movementin the plane of the toothed member and an independent movementtransverse to saidplane, a spring causing a movement of the latter dogin one direction in the plane of the toothed member, and a separate sring causing the independent movement 6 the latter dog in one directiontransverse of the plane of the toothed member.

v18. In an escapement mechanism for typewriting machines, thecombination with the escapement-wheelhaving the rear faces of varm, oneof said dogs having a'beveled rear face, and means ermitting saidbeveled dog to move relative y to the other in the plane of theescapement- Wheel to produce the spacing and transversel of said planewhen the beveled face on the g is engaged by the beveled face of thewheel to permit said wheel to rotate in a reverse direction.

19. In an escapement mechanism for typewriting m achines,the combinationWith the escapement member having teeth with beveled rear'faces, of anarm rocking about an axis parallel to the direction of movement of thetoothed member, a pair of dogs carried by said rocking arm, one of saiddogs having a beveled rear face, and means permitting said beveled dogto move relatively to the otherin the direction of movement of saidtoothed member to produce the spacing and 1n a, direction transverse tosaid toothed member when the beveled face on the dog is engaged by thebeveled teeth of the escapement member to permit said member to move inthe direction opposed to the spacing movement. I

20. In an escapement mechanism, the combination with a carriage rack anda carriage-return spring,of a gear-Wheel mounted on the sprin -shaft,turned by the spring and meshing wit the rack, a pinion geared to thegear-wheel and meshing with the rack, an escapement-wheel turned by thepinion and means for controlling the escapement-wheel.

21. In an escapement mechanism, a carriage-rack," a spring, a gearconnecting the rack and the spring, and an escapement-wheel geared tothe rack and to the gear connecting the rack and the spring.

22. In an escapement mechanism, a car-- riage-rack, a spring, agear-wheel connecting the rack and the spring-shaft to transmit motionfrom the spring. to the rack, an escapement-wheel, a pinion on the shaftof the escapement-wheel meshing with the rack, and. a pinion meshingwith the gear-wheel and the other pinion. i

23. In a Writing-machine, the combination with a 1n achine-frame, and acarriage mounted to travel thereon and a rack mounted on the carriage,of a detachable frame, a feed; spring on said detachable frame, a gearwheel mounted on the feed-spring meshing with said rack, a device forcontrolling the movement of said rack, a gear-wheel carried by saidcontrolling device meshing with said rack, and means for maintaining theproper relative positions between the two gearwheels. i

- 24. The combination with the mainframe, .of a detachable framecarrying a carnagereturn spring, the escapement-dogs and theescapementwheel; and key-levers on the main frame having looseconnection with the escapement-dogs through which the dogs arecontrolled.

25. In a type-writing machine, the combination of a detachable framecarrying the 0 I escapement-dogs, and the escapement-wheel; and arelease-key mounted independently of the detachable frame and having aloose con nection with the dogs to throw them out of engagement with theescapement-wheel.

26. In a type-Writing machine, the combination with a detachable framecarrying the return-spring, the escapement-wheel and the dogscontrolling the escapement-wheel; of key-levers mounted independently ofthe frame, and having a loose connection with the dogs to control them,

27. In a type-Writing machine, the combination with adetachable framecarrying the return-spring, the escapement-wheel and the dogscontrolling the escapement-wheel; of key-levers mounted independently ofthe frame and having a loose connection with the dogs to control them,and a release-key havinga loose connection with the dogs to release thees'capement-wheel.

28. In a typeswriting machine, the combination with the carriage and thekey-levers, of a detachableframe carrying a return-spring having alooseconnection with the carriage, and an escapement mechanism having a looseconnection with the carriage and the key-levers.

- 29. In a type-writing machine, a detachable frame carrying thereturn-spring, the loo escapement mechanism and the signaling mechanism,all of said mechanisms having loose connection with the parts which theyoperate or by which they are operated.

' 30. In atype-writing machine, the combination with the machine-frame,a carriage mounted to travel thereon, a detachable frame, a carriagecontrolling mechanism mounted'on said detachable frame and movableplates provided with thumb-pieces mountedon one of said frames andmovable into engagement with the other of said frames to hold saiddetachable frame in adjusted position.

31. In a type-writing machine, the com-. bination with themachine-frame, and a-carriage mounted to travel thereon, of a detachableframe, a carriage-controlling mechanism mounted on said detachable frameand with hand-operated movable plates'mounted on one of said frames andmovable into engagement with the other of said frames to hold saiddetachable frame in adjusted position.

' I JEROME B. SECOR.

